Oil pump



June 22, 1937. A K I N 2,0 4,444

- OIL PUMP Filed Aug. 26, 1935 AR THUR HOG/AN //v vzv TOR A TTOR NE Y Patented June 22, 1937 Application August 26,1935, Serial No. 37,790

1 Claim.

This invention relates to an improved oil pump or, in fact, a pump for various fluids, and has for one of its principal objects the provision of a pump which shall be very simple and economical to manufacture as being composed of a minimum of parts, easy of operation and not likely to get out of order.

One of the important objects of this invention is the provision of a fiuid pump of the planetating eccentric type wherein but a single valve element is used which valve element is a part of the rotating means and which slidably operates against a seat formed in the casing.

A still further important object of the invention resides in the provision of simple and minimum passages for the flow of oil or other liquid through the pump and which are so designed as to produce a structure capable of delivering desired quantities of fluid at desired pressures over a very considerable range.

Other and further important objects of the invention will be apparent from the disclosures in the accompanying drawing and following specification.

The invention, in a preferred form, is shown.

in the drawing and hereinafter more fully described.

In the drawing: 7

Figure 1 is an elevation of the improved pump of this invention with the end or cover plate removed, showing the interior construction and with the rotating element in the intake position.

Figure 2 is a view similar to Figure 1 but showing the rotating element in the exhaust position.

Figure 3 is a sectional view taken on the line 3-3 of Figure 1.

As shown in the drawing:

The reference numeral I0 indicates generally the casing or body of the improved pump of this invention, the same being essentially a cylinder with a restricted offset portion l2 in which a driving shaft I4 is mounted, and at the end of the extension I2 is positioned the usual packing gland I6.

An inlet fitting I8 is mounted in a suitable intake opening 20 in the extension l2, and the interior face of the extension I2 is annularly recessed as shown at 22 to provide a circular groove whereby the oil or other fluid entering through the intake l820 will surround the shaft II.

A transverse opening 24 is made in the shaft adjacent the groove 22, and a longitudinal opening 26 is bored centrally of the shaft beginning at its inner end and extending to the channel 24 as best shown in Figure 3; 7

At its inner end, the shaft I4 is enlarged to provide a cam or eccentric element 28 upon which is mounted an annular planetating element 30. The width of the planetating element 30 is such that at the high point of the cam structure 28, the element 30 will slidably contact the inner face of the casing I0 as best shown in Figure l.

A further cross channel 32 is drilled in the cam element 28, and this terminates in an. annular groove 34 as best shown in Figure 3, this groove being aligned with a channel or opening 36 formed in the planetating element 30. The channel 36 communicates with the space between this element '38 and the interior face of the hous-' ing it, and this space is defined at one end by the line of contact between the element 30 and the housing, and at the other end by a valve element 38 which is mounted on or is integral with the planetating element 30 and which is of a shape shown in Figures 1 and 2 having a nose 40 adapted to slidably contact one surface of a a recess 42 formed in the pump casing It.

The nose 4D is of such an extent that it will always properly contact the corresponding face of the recess 42 even after considerable wear, and a tight seal will always result.

In operation, planetation of the element 30 produces an increasing space between the valve contact 40-42 and the line of contact between the planetary element 30 and the interior face of the housing I0, thereby producing a suction through the channels 36, 32, 26, and 24 drawing the oil or other fluid into the inlet l8. This space increases to a maximum and then proceeds to diminish as the planetary element proceeds around the inner circumference of the housing I0 whereupon a pressure is set up on the fluid outlined in the space behind the valve element 38, and the fluid is thereupon forced outwardly through the channel 44 formed in the casing l0, and thence through the outlet fitting or the like 48.

It will be evident that herein is provided a simple, economical, efficient and sturdy oil or other pump which should meet all requirements for such a device and which will'be especially.

adaptable where high speeds and maximum pressures are employed. However, the device will operate just as well at low speeds and lower pressures. The fact that, when employed as an oil pump, the device will be self-lubricating lends an additional advantage as the construction is such that the oil will penetrate to all moving parts, thereby insuring maximum efliciency and with a long life. 7

' I am. aware that many changes may be made and numerous details of construction varied throughout awide range Without departing from housing, a planetating element mounted in the housing for line contact therewith, a single valve element mounted on the planetating element and extending into a recess in the housing, the valve element including a nose adapted to form a line contact with a corresponding plane; surface of the recess, an integral driving shaft cam for operating the said element, and a bearing for the driving shaft integral with the housing, an inlet for liquid to be pumped in the bearing and a final inlet'therefor in the planetating element into the interior of the housing, a corresponding opening through the shaft connecting said inlet,

j said opening comprising a channel extending longitudinally of the shaft, and cross channels in the shaft alignedwith therinlet openings to the shaft, one of said cross channels being provided in the cam portion of the shaft, and an annular peripheral groove in said cam portion continuously connecting said last named channel with said inlet in the planetating element.

ARTHUR KOSIAN. 

